Surge Voltage Generator for Cable Fault Location: Precision in High-Voltage Diagnostics

Surge voltage generators are key diagnostic tools specially designed for accurately locating faults in underground and overhead power cables. Rather than testing surge immunity, these systems deliver controlled high-energy pulses to identify damaged sections of cable using acoustic or electromagnetic methods.

This article provides a technical overview of these generators, with a focus on the HVC-GS— a compact, powerful, and field-proven solution optimized for fault pinpointing in power cables.

Highlights of the HVC-GS Generator

  • Compact, portable, and rugged for use in diverse environments
  • Continuously adjustable output voltage (up to 16 kV)
  • Automatic grounding for user safety
  • Discharge energy optimized through a capacitor switch
  • High-energy peaks ideal for clear and accurate fault localization

Scope of Supply:

  • 220 V AC power cable — 5 meters
  • Shielded high-voltage output cable — 5 meters
  • Safety grounding cable — 5 meters
  • Direct discharge rod
  • Operation manual

How It Works

The HVC-GS works by applying short, high-voltage surges to a faulty cable. When the surge reaches a breakdown point (such as a fault or insulation failure), a sudden energy release generates an acoustic signal and a voltage drop — both detectable by pinpointing devices like a TDR (Time-Domain Reflectometer).

Its core system includes:

  • Impulse Generator – Delivers shaped surge pulses for precise diagnostics
  • Energy Storage Module – Charges up to deliver high-energy discharges
  • Discharge Unit – Releases energy through the cable in a controlled pulse
  • Control Interface – Lets the user manage pulse timing, voltage levels, and safety grounding

Applications

Surge generators like the HVC-GS are primarily used by utility companies, electrical contractors, and diagnostic engineers for:

  • Locating breakdowns in underground cables
  • Identifying insulation faults and short circuits
  • Assisting cable route tracing in complex installations
  • Complementing reflectometry and fault pre-location systems

Reliable Cable Fault Diagnosis – HVC-GS by High Voltage Control

Manufactured by High Voltage Control and based in Miami, Florida, the HVC-GS is tailored for professionals who need accurate and efficient cable fault location. The equipment is available for rental, and all product specifications and accessories are outlined in our detailed catalog.

Investing in quality fault location tools like the HVC-GS improves diagnosis speed, reduces service downtime, and ensures safer, more reliable maintenance workflows

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